Question

This is a similar triangle please find the missing length. (?)

Answer 1

10

Explanation:

Set up as a proportion:

`(QR)/(QP)=(BA)/(BC)`, insert given values

`(?)/(12)=(30)/(36)`, cross multiple

36*?=30*12

36*?=360, divide both sides by 36 to get the missing side (?) by itself

?=10